N9054U
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| UNITED AIRLINES, INC. (CALA) | Operator | on 1986-04-08 | Operator named in NTSB report |
Accident & incident history
Operated by UNITED AIRLINES (per NTSB report)
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
6 reports on file, 1995-11-14 – 1997-07-15.
Part: PRESS SWITCH — MALFUNCTIONED (NR 2 BOOST PUMP)
NR 2 FORWARD LOW PRESSURE BOOST PUMP SLOW TO INDICATE. *S/D* TROUBLESHOOTING INDICATED THAT THE NR 2 FORWARD BOOST PUMP WAS OPERATING NORMALLY. CLEANED CANNON PLUG D76 AT SUBJECT BOOST PUMP, REPLACED BOTH BOOST PUMP LOW PRESSURE SWITCH, AND THE BOOST PUMP ITSELF (AS A PRECAUTION). PRIMED BOOST PUMP AND PRESSURE SWITCH SENSE LINE, OPS CHECK GOOD.
Part: RELAY — FAILED (FLIGHT DECK)
NR 2 TANK FORWARD FUEL PUMP LOW PRESSURE LIGHT IS ON WHEN SWITCH IS ON WITH FUEL PRESENT IN THE TANK. CREW ATTEMPTED TO TURN PUMP OFF AND WOULD NOT TURN OFF. LEFT SWITCH IN ON POSITION AND SHORTLY THEREAFTER PUMP LOW PRESSURE LIGHT CAME ON. CREW FOUND PUMP CIRCUIT BREAKER POPPED. *S/D* TROUBLESHOT SYSTEM HAND-OVER-HAND WIRE CHECK IDENTIFIED MODULE 181, RELAY R21 AS CAUSE. REPLACED R21 RELAY. REPLACED P5 MODULE ON FLIGHT DECK AS A PRECAUTION.
Part: RETRACT MECH — MALFUNCTIONED (LE FLAPS)
WITH FLAPS UP (CRUISE CONFIGURATION) AND ALL OVERHEAD LEADING EDGE ANNUNCIATOR LIGHTS OUT, THE LEADING EDGE FLAPS EXTENDED LIGHT (FWD PANEL) IS ON. THE CREW COULD NOT RETRACT THE NR 1 LEADING EDGE SLAT.
Part: SLIDE BOTTLE — LOW PRESSURE (R1 DOOR)
EMERGENCY SLIDE AT DOOR 1 RT READS LOW ON PRESSURE. READS 2800 AT 70 DEGREES. SLIDE PRESSURE BOTTLE APPEARED TO BE COLD SOAKED. PRESSURE READS NORMAL AT ROOM TEMPERATURE.
Part: COUPLER — CORRODED (RUDDER)
AT FL310 GOT A YAW DAMPER KICK THAT STARTED A OSCILLATION THAT KEPT GETTING STRONGER. AIRCRAFT FELT LIKE IT WANTED TO ROLL TO THE LEFT. TURNED YAW DAMPER OFF, STILL HAD SOME OSCILLATION, RECOVERED WITH AILERON CONTROL. AIRCRAFT NORMAL REST OF DESCENT. *S/D* THE MAIN RUDDER POWER CONTROL UNIT AND THE YAW DAMPER COUPLER WERE REPLACED. FURTHER INVESTIGATION FOUND CORROSION ON THE D295 BENCH PLUG OF THE YAW DAMPER COUPLER.
Part: INDICATOR WIRE — FAILED (NR 3 LE SLAT)
NR THREE LEADING EDGE DEVICE FAILED TO RETRACT AFTER TAKEOFF. THIS WAS FOUND TO BE AN INDICATION PROBLEM. THE NR THREE LEADING EDGE SLAT ACTUATOR ROD END WIRE ASSEMBLY WAS REPLACED. CHECKS O.K.